Allow python creation of QgsFeatureIterator from an abstract one

Author: elpaso

python/core/auto_generated/qgsfeatureiterator.sip.in

@@ -215,6 +215,10 @@ Wrapper for iterator of features from vector data provider or vector layer
     QgsFeatureIterator();
 %Docstring
 construct invalid iterator
+%End
+    QgsFeatureIterator( QgsAbstractFeatureIterator *iter /Transfer/ );
+%Docstring
+construct a valid iterator
 %End
     QgsFeatureIterator( const QgsFeatureIterator &fi );
 %Docstring

src/core/qgsfeatureiterator.h

@@ -278,10 +278,8 @@ class CORE_EXPORT QgsFeatureIterator
 
     //! construct invalid iterator
     QgsFeatureIterator() = default;
-#ifndef SIP_RUN
     //! construct a valid iterator
-    QgsFeatureIterator( QgsAbstractFeatureIterator *iter );
-#endif
+    QgsFeatureIterator( QgsAbstractFeatureIterator *iter SIP_TRANSFER );
     //! copy constructor copies the iterator, increases ref.count
     QgsFeatureIterator( const QgsFeatureIterator &fi );
     //! destructor deletes the iterator if it has no more references